Electron density dependence of in-plane spin relaxation anisotropy in GaAs/AlGaAs two-dimensional electron gas

被引：35
|
作者：
Liu, Baoli
Zhao, Hongming
Wang, Jia
Liu, Linsheng
Wang, Wenxin
Chen, Dongmin
Zhu, Haijun
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China
[2] Intelligent Epitaxy Technol Inc, Richardson, TX 75081 USA
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 11期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2713353
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The authors investigated the spin dynamics of two-dimensional electrons in (001) GaAs/AlGaAs heterostructure using the time-resolved Kerr rotation technique under a transverse magnetic field. The in-plane spin lifetime is found to be anisotropic below 150 K due to the interference of Rashba [J. Phys. C 17, 6039 (1984)] and Dresselhaus [Phys. Rev. 100, 580 (1955)] spin-orbit coupling and D'yakonov-Perel [Sov. Phys. Solid State 13, 3023 (1972)] spin relaxation. The ratio of in-plane spin lifetimes is measured directly as a function of temperature and pump power, showing that the electron density in two-dimensional electron gas channel strongly affects the Rashba spin-orbit coupling. (c) 2007 American Institute of Physics.
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页数：3
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